Reinforced bead structure for explosion-proof tires

Abstract

The utility model relates to tire technical field discloses a reinforced bead structure of anti -explosion tire, including the outer surface, the both sides of outer surface are equipped with the sidewall, the surface fixed of sidewall is equipped with the reinforced rubber ring no.

Description

Technical Field

[0001] This utility model relates to the field of tire technology, specifically to a reinforced bead structure for an explosion-proof tire. Background Technology

[0002] Run-flat tires, also known as "explosion-proof tires," can support the vehicle body with their reinforced sidewall structure after the tire loses pressure, allowing the vehicle to continue driving safely within a certain speed and distance, thereby improving driving safety.

[0003] Existing run-flat tire technologies primarily focus on reinforcing the sidewall, such as by increasing rubber thickness or embedding support strips to achieve run-flat support. However, in the event of tire depressurization, the weight of the entire vehicle is ultimately transferred through the sidewall to the bead area, where the bead, tightly bonded to the rim, bears exceptionally high stress. Traditional bead structures mainly consist of a steel wire ring and a triangular rubber strip, whose rigidity and strength may be insufficient under extreme conditions of prolonged underinflation, easily leading to bead deformation. The immense pressure may cause the steel wire ring to twist or the shape of the bead root to change, affecting the seal with the rim and even causing air leakage. When the vehicle is turning, lateral forces may cause the bead to detach from the bead seat on the rim, resulting in serious safety accidents. Stress concentration accelerates the aging and fatigue of the rubber materials in the bead area, shortening tire life.

[0004] Therefore, providing a reinforced bead structure that can effectively disperse and withstand the enormous stress under run-flat conditions and prevent bead deformation and detachment has become an urgent problem to be solved in this field. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a reinforced bead structure for run-flat tires, which has the advantage of effectively dispersing and bearing enormous stress in the event of a deflation, thus solving the problems mentioned in the background section.

[0006] This utility model provides the following technical solution: a reinforced bead structure for an explosion-proof tire, including an outer tire tread, with sidewalls on both sides of the outer tire tread, a first reinforcing rubber ring fixedly provided on the surface of the sidewall, a first reinforcing steel wire with a raised ring fixedly provided inside the first reinforcing rubber ring, an airtight layer fixedly provided on the inner wall of the outer tire tread, a tire bead on both sides of the airtight layer, a triangular rubber filling inside the tire bead, a protrusion fixedly provided on the outer ring of the tire bead, a filling rubber filling inside the protrusion, a second reinforcing rubber ring fixedly provided inside both sides of the airtight layer, and a second reinforcing steel wire with a raised ring fixedly provided inside the second reinforcing rubber ring.

[0007] As a preferred embodiment of this utility model, a reinforcing steel wire one is fixedly provided inside the tire bead, and a reinforcing steel wire two is fixedly provided inside the protrusion.

[0008] As a preferred embodiment of this utility model, a tire carcass ply layer is fixedly provided between the outer tire tread and the airtight layer, a steel wire ply layer is fixedly provided in the middle of the tire carcass ply layer, and a covering layer is fixedly provided on the surface of the steel wire ply layer.

[0009] As a preferred embodiment of this utility model, buffer strips are provided on both sides of the steel wire cord layer, and the buffer strips are located between the steel wire cord layer and the tire cord layer.

[0010] As a preferred embodiment of this utility model, the outer tire tread is provided with a tire crown in the middle, and the surface of the tire crown is provided with a central pattern.

[0011] As a preferred embodiment of this utility model, a tire shoulder is provided between the tire wall and the tire crown, and the surface of the tire shoulder is provided with side grooves.

[0012] As a preferred embodiment of this utility model, the cross-sections of the first and second reinforcing rubber rings are semi-circular, and the diameters of the first and second reinforcing rubber rings are equal.

[0013] As a preferred embodiment of this utility model, the tire bead is coaxial with the outer tire tread, and the airtight layer is installed on the rim of the wheel hub through the tire bead.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The reinforced bead structure of this run-flat tire consists of a reinforcing rubber ring 1 on the outside of the sidewall and a reinforcing rubber ring 2 inside the airtight layer. Convex reinforcing steel wires are embedded within both rings, forming a "ring-shaped reinforcing rib" on the sidewall. When the tire loses pressure, these reinforcing ribs effectively limit excessive bending and folding of the sidewall. Simultaneously, the reinforced bead structure (reinforcing steel wire 1, reinforcing steel wire 2, triangular rubber, and filler rubber) provides a stable base for sidewall support. This combined internal and external, top-to-bottom three-dimensional support system greatly enhances the overall rigidity of the tire in a deflated state.

[0016] 2. The reinforced bead structure of this run-flat tire, with reinforcing steel wire one inside the bead and reinforcing steel wire two inside the protrusion, significantly enhances the lateral and radial rigidity of the bead area. This makes the bead less prone to shape change when subjected to huge pressure and can be firmly locked onto the bead seat on the rim, effectively preventing air leakage caused by bead deformation and possible bead detachment accidents during steering, thus significantly improving safety. The outer reinforcing rubber ring one and the inner reinforcing rubber ring two correspond to each other, effectively dispersing and transferring the concentrated stress generated under air shortage conditions, avoiding excessive stress concentration in a single area at the root of the bead. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0018] Figure 2 This is the second structural schematic diagram of the present invention;

[0019] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 4 This utility model Figure 3 A magnified structural diagram at point A;

[0021] Figure 5 This utility model Figure 3 A magnified structural diagram at point B.

[0022] In the diagram: 1. Tire tread; 2. Tire crown; 3. Tire sidewall; 4. Center tread pattern; 5. Tire shoulder; 6. Side tread pattern; 7. Reinforcing rubber ring one; 8. Raised ring reinforcing steel wire one; 9. Airtight layer; 10. Reinforcing rubber ring two; 11. Raised ring reinforcing steel wire two; 12. Tire bead; 13. Reinforcing steel wire one; 14. Triangle rubber; 15. Raised section; 16. Reinforcing steel wire two; 17. Filler rubber; 18. Tire carcass ply; 19. Steel cord ply; 20. Overlay; 21. Cushioning strip. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 The reinforced bead structure of the run-flat tire includes an outer tread 1, with sidewalls 3 on both sides of the outer tread 1. A reinforcing rubber ring 7 is fixedly provided on the surface of the sidewall 3, and a convex reinforcing steel wire 8 is fixedly provided inside the reinforcing rubber ring 7. An airtight layer 9 is fixedly provided on the inner wall of the outer tread 1, and a tire bead 12 is provided on both sides of the airtight layer 9. The tire bead 12 is used to airtightly install the tire onto the rim of the wheel hub. The inside of the tire bead 12 is filled with a triangular rubber 14, and a protrusion 15 is fixedly provided on the outer ring of the tire bead 12. The inside of the protrusion 15 is filled with a filler rubber 17. The tire bead 12, triangular rubber 14, protrusion 15 and filler rubber 17 work together to improve the pressure resistance of the sidewall 3. A second reinforcing rubber ring 10 is fixedly provided inside both sides of the airtight layer 9, and a second convex reinforcing steel wire 11 is fixedly provided inside the second reinforcing rubber ring 10. They are radially corresponding and form a strong support ring that echoes the inside and outside of the tire sidewall area.

[0025] In this embodiment, preferably, a reinforcing steel wire 13 is fixedly provided inside the tire bead 12, and a reinforcing steel wire 26 is fixedly provided inside the protrusion 15. The reinforcing steel wire 13 and the reinforcing steel wire 2 16 together constitute the core skeleton of the tire bead part, enabling it to withstand great mechanical stress. The tire bead 12 is coaxial with the outer tire tread 1, and the airtight layer 9 is installed on the rim of the wheel hub through the tire bead 12. The rim can limit the tire position through the tire bead 12.

[0026] In this embodiment, preferably, a carcass ply 18 is fixed between the outer tire tread 1 and the airtight layer 9 to form the main skeleton of the tire. A steel cord ply 19 is fixed in the middle of the carcass ply 18 to enhance the strength of the crown 2 area. A cover layer 20 is fixed on the surface of the steel cord ply 19. Buffer strips 21 are provided on both sides of the steel cord ply 19. The buffer strips 21 are located between the steel cord ply 19 and the carcass ply 18 to relieve impact and disperse stress. A crown 2 is provided in the middle of the outer tire tread 1, and a central tread pattern 4 is provided on the surface of the crown 2.

[0027] In this embodiment, preferably, a shoulder 5 is provided between the sidewall 3 and the crown 2, and the surface of the shoulder 5 is provided with side treads 6 to provide grip and drainage.

[0028] In this embodiment, preferably, the cross-sections of the first reinforcing rubber ring 7 and the second reinforcing rubber ring 10 are semi-circular, and the diameters of the first reinforcing rubber ring 7 and the second reinforcing rubber ring 10 are equal, so that they can be subjected to force evenly.

[0029] Before installation, ensure that the tire bead seat on the vehicle rim is intact, clean, and free of burrs, deformation, or rust to ensure a tight fit with the tire bead 12. Place the run-flat tire on the rim, aligning the tire beads 12 on both sides with the tire bead seat on the rim. Using professional tire installation equipment, press the tire beads 12 safely and evenly into the rim grooves. Inflate the tire to the standard tire pressure recommended by the vehicle manufacturer. During this process, the reinforcing steel wire 13 inside the tire bead 12 and the reinforcing steel wire 2 16 inside the protrusion 15 will ensure that the tire bead can withstand the inflation pressure and is firmly locked on the rim, forming an effective seal. The airtight layer 9 will ensure the airtightness of the tire's interior.

[0030] Under normal inflation conditions, the tire bears the vehicle weight and driving load through the carcass ply 18 and the steel cord ply 19. At this time, the reinforcing rubber ring 7 of the sidewall 3 and the reinforcing rubber ring 2 10 inside the airtight layer 9 (together with the internal convex ring reinforcing steel wire 8 and convex ring reinforcing steel wire 2 11) serve as a pre-reinforcement structure, providing an additional rigidity base for possible pressure loss conditions. The side tread 6 of the shoulder 5 and the center tread 4 of the crown 2 provide grip and drainage. The bead area is reinforced by the reinforcing steel wire 13, reinforcing steel wire 2 16, triangular rubber 14 and filler rubber 17. Even when encountering severe steering or lateral forces during normal driving, it can effectively suppress bead deformation and improve handling stability.

[0031] When a tire is punctured or loses pressure due to other reasons, this tire is designed to allow safe driving for a certain distance under certain conditions after complete pressure loss (please refer to the specific speed and mileage recommendations provided by the tire manufacturer, usually no more than 80 km / h and no more than 80 km). After pressure loss, the vehicle's weight presses down, and the sidewall 3 will bend. At this time, the reinforcing rubber ring 7 located on the outside of the sidewall 3 and the reinforcing rubber ring 10 located inside the airtight layer 9 (and its internal convex reinforcing steel wire) work together to form a "ring reinforcing rib," effectively limiting excessive folding and deformation of the sidewall 3. It provides strong lateral support to prevent the tire from being completely flattened. The huge load is transferred to the bead area through the supported sidewall. The bead 12 and the raised structure 15, which are reinforced by reinforcing steel wire 13, reinforcing steel wire 2 16, triangular rubber 14 and filler rubber 17, provide extremely high rigidity and strength. It can effectively disperse and bear this abnormal stress, prevent the steel wire bead from twisting, the shape of the bead root from changing, and the failure of the seal with the rim. When turning under the pressure loss, the reinforced bead structure can lock firmly on the rim bead seat, which greatly reduces the risk of the bead coming off due to lateral force and ensures driving safety.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reinforced bead structure for an explosion-proof tire, comprising an outer tread (1), characterized in that: The outer tire tread (1) has sidewalls (3) on both sides. A reinforcing rubber ring (7) is fixedly provided on the surface of the sidewall (3). A reinforcing steel wire (8) with a raised ring is fixedly provided inside the reinforcing rubber ring (7). An airtight layer (9) is fixedly provided on the inner wall of the outer tire tread (1). A tire bead (12) is provided on both sides of the airtight layer (9). A triangular rubber (14) is filled inside the tire bead (12). A protrusion (15) is fixedly provided on the outer ring of the tire bead (12). A filler rubber (17) is filled inside the protrusion (15). A reinforcing rubber ring (10) is fixedly provided inside both sides of the airtight layer (9). A reinforcing steel wire (11) with a raised ring is fixedly provided inside the reinforcing rubber ring (10).

2. The reinforced bead structure of the explosion-proof tire according to claim 1, characterized in that: The interior of the tire bead (12) is fixedly provided with a first reinforcing steel wire (13), and the interior of the protrusion (15) is fixedly provided with a second reinforcing steel wire (16).

3. The reinforced bead structure of the explosion-proof tire according to claim 1, characterized in that: A carcass ply layer (18) is fixedly provided between the outer tire tread (1) and the airtight layer (9). A steel wire ply layer (19) is fixedly provided in the middle of the carcass ply layer (18). A covering layer (20) is fixedly provided on the surface of the steel wire ply layer (19).

4. The reinforced bead structure of the explosion-proof tire according to claim 3, characterized in that: Both sides of the steel cord fabric layer (19) are provided with buffer strips (21), which are located between the steel cord fabric layer (19) and the carcass fabric layer (18).

5. The reinforced bead structure of the explosion-proof tire according to claim 1, characterized in that: The outer tire tread (1) has a crown (2) in the middle, and the surface of the crown (2) has a central pattern (4).

6. The reinforced bead structure of the explosion-proof tire according to claim 5, characterized in that: A shoulder (5) is provided between the tire wall (3) and the tire crown (2), and the surface of the shoulder (5) is provided with side grooves (6).

7. The reinforced bead structure of the explosion-proof tire according to claim 1, characterized in that: The cross-sections of the first reinforcing rubber ring (7) and the second reinforcing rubber ring (10) are semi-circular, and the diameters of the first reinforcing rubber ring (7) and the second reinforcing rubber ring (10) are equal.

8. The reinforced bead structure of the explosion-proof tire according to claim 1, characterized in that: The tire bead (12) is coaxial with the outer tire tread (1), and the airtight layer (9) is installed on the rim of the wheel hub through the tire bead (12).

Images